A couple of customers reported issues after updating to Woocommerce 2.3.3 with the payment options displayed twice on the checkout page.
All customers are using Woocommerce 2.3.3, WooCommerce German Market 2.4.7 and Enfold 3.0.8. I can confirm this is an issues with WooCommerce German Market Edition. After deactivating the plugin the payment options are displayed correct.
To solve that issue copy the file /wp-content/plugins/woocommerce/templates/checkout/review-order.php to the directory /woocommerce/checkout/ within your enfold child theme. If the directory does not exist simply create it. Ounce the file is copied the display on the checkout returns to normal.